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Novel connection method of ceramic bodies

A technology of ceramic body and connection method, which is applied in the field of ceramic gel and connection to prepare complex or large-sized ceramic materials, which can solve the problems of high slurry dependence and influence on the uniformity of the microstructure of the connection body, and achieve the improvement of mechanical properties. performance, improved microstructural uniformity, and the effect of getting rid of slurry binder dependence

Active Publication Date: 2015-03-04
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the connection technology using ceramic slurry as a binder is highly dependent on the slurry, and the slurry not only needs to have excellent wettability, but also needs to have a certain bonding ability
Moreover, due to the action of capillary force, the moisture in the slurry will immerse into the connected green body, resulting in the formation of a layer of intermediate layer where the particles are packed more closely at the connection, that is, a dense intermediate layer is formed between the two connection surfaces. layer, affecting the uniformity of the microstructure of the linker

Method used

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  • Novel connection method of ceramic bodies
  • Novel connection method of ceramic bodies
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Experimental program
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preparation example Construction

[0025] (1) Preparation of ceramic gel: use water as solvent, add water-soluble butene polymer and ceramic powder, wherein: the mass ratio of water-soluble butene polymer to water can be 0.005:1~0.05 : 1; the solid phase content of the ceramic powder can be between 50~58vol%. Inject the prepared ceramic slurry into the forming mold, and then perform in-situ curing and aging at 30°C to 80°C after sealing;

[0026] (2) After the aged ceramic gel is removed from the mold, the flatness of the connection surface is treated, and then the two ceramic gels are directly butted together to realize the connection. The functional groups of the organic molecular chains in the ceramic gel have a bonding effect and are reactive during the aging process, so that the ceramic gel exhibits natural plasticity and viscosity. The two connecting surfaces are connected into a whole by the action of organic molecules, and there is no need to add any adhesive or apply pressure to the connection.

[00...

Embodiment 1

[0039] Embodiment 1: the connection method of alumina ceramic gel

[0040] The alumina ceramic powder used is provided by Sumitomo Chemical Co., Ltd., Japan, with an average particle size of about 0.45 μm. Add 0.6g of cis-butene polymer combined with long and short chains to 50g of deionized water, mix and dissolve in water for 10min, then add 200g of alumina ceramic powder, mix and ball mill with a planetary ball mill for 30min, after mixing evenly, vacuum remove the ceramic slurry gas. After degassing, the slurry was injected into a plastic mold, sealed with a PVC film and placed in a 50°C constant temperature box for in-situ curing and aging. After aging for 1 to 80 hours, take it out and demould, and perform mechanical cutting on the connecting surface to ensure the cleanliness and flatness of the surface, and then figure 1 The alumina ceramic gels are shown directly butted against each other. The connected ceramic gel is dried in a constant temperature and humidity box...

Embodiment 2

[0041] Embodiment 2: the preparation method of zirconia connector

[0042] Add 1.08 g of butene-based polymers combining long and short chains and 360 g of zirconia ceramic powder to 50 g of deionized water, and mix for 30 minutes with a planetary ball mill. After mixing evenly, the ceramic slurry is vacuum degassed, then poured into a plastic mold, sealed with a PVC film, and placed in a 50°C constant temperature box for in-situ curing and aging. After aging for 1 to 80 hours, take it out and demould, and perform mechanical cutting on the connecting surface to ensure the cleanliness and flatness of the surface. The zirconia ceramic gels are directly connected to each other, and the connected ceramic gels are dried in a constant temperature and humidity box. The drying is controlled at a temperature of 30°C and a humidity of 75%. After drying, the zirconia connected body can be obtained.

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Abstract

The invention relates to a novel connection method of ceramic bodies. The connection method comprises the following steps: pouring a first ceramic slurry containing first ceramic powder, a first water-soluble maleic polymer and water into a mold, and performing in-situ solidification and ageing, thereby preparing a first ceramic body in the form of ceramic gel; pouring a second ceramic slurry containing second ceramic powder, a second water-soluble maleic polymer and water into a mold and performing in-situ solidification and ageing, thereby preparing a second ceramic body in the form of ceramic gel; and performing surface flatness treatment on connecting surfaces of the prepared first ceramic body and second ceramic body, and directly connecting end to end to ensure that the first ceramic body is connected with the second ceramic body. By adopting the novel connection method disclosed by the invention, the ceramic gels can be connected by only using bonding effects of water-soluble maleic organic molecules in the ceramic gels under the condition that any binding agent is not used.

Description

technical field [0001] The invention relates to a novel connection method for a ceramic body, which belongs to the field of ceramic-ceramic connection. Specifically, it relates to the ceramic gel prepared by the water-soluble butene gel system. Due to the bonding between the functional groups of the organic molecular chain, it exhibits natural plasticity and viscosity during the aging process. Go directly to the gel ligation operation. The invention does not need to add any adhesive or apply pressure at the joint, has the advantages of uniform microstructure at the joint, high strength of the joint after sintering, simple and effective process, simple operation and the like. It is especially suitable for connecting complex or large-sized ceramic materials. Background technique [0002] Ceramic joining technology is an effective means for the practical application of engineering ceramics. On the one hand, it can reduce the difficulty of forming complex or large-sized parts,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/48C04B35/582C04B35/58C04B35/505C04B35/565C04B35/624
Inventor 彭翔岛井骏臧孙怡周国红王士维
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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